SU52015A1 - Thread cutter at the breakage, gathering or tightening of one of the threads that feed the system in a circular knitting machine - Google Patents

Description

In order to increase the productivity of round knitting machines of the English type, thread trimmers for yarns have already been proposed that operate when one of the yarns feeding the system is broken. In the previously proposed devices, the scissors for cutting the threads and the needle press moved either from the electromagnet turned on by the part controlling the tension of the threads feeding the system or from the spring whose latch released the part to control the tension of the threads.

According to the present invention, the tension-controlling part mechanically releases the support of the load, the fall of which is used to strike the end of the release lever of the spring-loaded scissors, coupled with the needle press. This design of the device makes it more sensitive and capable of more fine adjustment.

In FIG. Figure 1 shows a side view of the device in its usual working condition; FIG. 2-view

on the side of the device after turning off the system, i.e. in the idle state; FIG. 3 is a top view of the tool and FIG. 4 is a front view of the fixture after turning off the system.

The thread trimmer is mounted in a box that is fixed to the body of the machine and consists of a base and a removable cover. On the rod a of the box of each system, two levers Q, Cj are mounted, bearing at the ends the known falling gratings S, S.2 supported by the tension of the threads going into the system, in this case, for example, two threads. In the upper part, each of the S-, Sy lattices is provided with a hook 5 supporting the arms C, €, and the lattices S, So from falling over the edge of the slot in the lid of the fixture box until the tension of the corresponding thread decreases. When the thread breaks or disappears, its tension drastically decreases, the corresponding lattice falls and its hook 3 ceases to be held behind the edge of the slotted cap, as a result of which the lever C,

or Co falls down, and its process / presses on the support plate P supporting the knocker Q, pivoting on the C axis. Besides the arms Cj-Co, there is also a wire bar j carrying the conducting threads of the eyes / 5- J4 and fitted with tail / 5. Bar Zj when tightening the thread, i. E; when its tension is increased, it also removes the support plate P from the QI knocker, allowing the latter to fall down in order to trim the threads and turn off the press.

The support plate P is fixed to a hinge on the rod a and a bracket 5, having a spike 8, interacting with the tail / 5 of the rod Zj. The pin 7, screwed into the wall of the box, limits the rotation of the bracket 5 on the rod b. By means of a coil spring 9, put on the rod b, the bracket 5 is connected with a bar / O, which is used for winding the spring 9 and is fixed with a screw / 7.

If the mechanism is turned on, then on the support plate P lies the end of the long arm of the knocker Q. The latter is equipped with a load Q-j and can swing about the axis C screwed into the back wall of the base. The short shoulder of the knocker is equipped with a pin 7 (5.

In the event of a fall from the base plate P, its short shoulder, rising upward, with the pin 16, touches the lever K, which strikes the end of the trigger lever.

The scissors are attached outside the box on the left side of the base. The left blade Pj of the scissors is stationary, and the right Pg of the movable one is the lever 77 for switching on the scissors. The movable blade can rotate near the rod e.

The force that drives the right blade P of the scissors is the spring J8, which is put on the rod E. The latter is fixed in the left wall of the base by means of a locking screw.

The force of the spring J8 can be increased by winding the spring by means of a rod e.

If the rest of the lever 77 rests on the short arm of the lever K, then the scissors are open, but if the thrustor knocks out this shoulder from the stop, then the scissors under the action of the spring 75 will close. When the scissors are closed, turning the right blade limits the short arm of the lever K, against which the lever 77 rests.

The movable blade R., is provided with a pin 27, which is inserted through the slit of the left side of the base into the box. At the time of the scissors, i.e. when they are closed, the pin 27 presses on the pin 22 of the left shoulder of the angle lever W. The latter swings near the rod d. The right arm of the lever and is equipped with pins 23 and 24.

If the crank arm is raised, the pin 23 raises the Qi knocking pin, and the pin 24 raises the falling arms C and C2.

Thus, the parts of the device after the work they have done are automatically included. To switch on the device, one should only open the scissors and hang the combs on the thread / 1, / 2 when the mechanism is turned on, i.e. when the scissors are opened, the clamp Qj is placed on the support plate P, the long arm of the angle lever G is lowered down, and the short arm of the lever K jumps over the lever arm 77 scissors.

At the time of closing the scissors should be off the press. For this process, the arm 28 of the scissors 77 is connected to the latch of a known spring-loaded press by a chain 30.

The subject matter of the invention.

1. Thread-cutter when one of the threads that feed the system in a round knitting machine of the English type is broken, collapsed or tightened, characterized by the use of the support plate P, fixed to the arm 5, which is rotatable on the stem b and maintained in working position equipped with a load Q., a clamp QI, rotatable near the axis C and intended to strike the end of the trigger lever of the shears, spring-loaded in the joint, with the purpose of turning them on when turning the bracket 5 together with the plate P.